Where can I find a jedi undertunic?

[ModernAnakinSkywalker]

I cannot fund an undertunic that looks like this, nor can I find a regular shirt that does. Why do Jedi wear two tunics anyway? Luke wears just the outer yet the inner tunic is show to be a stand in for a regular button down in TLJ casino scene.

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[For Tyeth]

This isn't an exact match but is the closest undertunic I know of:

https://www.etsy.com/uk/listing/650161077/star-wars-obi-wan-kenobi-episode-3-shirt?ga_order=most_relevant&ga_search_type=all&ga_view_type=gallery&ga_search_query=Jedi+undertunic&ref=sr_gallery-1-5&organic_search_click=1

[janx]

I got my outfit from The Jedi Closet.  She makes her undertunics as a dickie.  So it's a fake shirt.  it's just the collar and enough fabric to be seen "under" the main tunic.

To let the cat out of the bag, a lot of uniforms you see on shows are using dickies to get that layers of collar look. 

The extra plus side is, for costuming, do you really want to be wearing 3-4 layers of full shirts? No.  Dickies sound lame, but they are the way to go.

Now you can of course wear a full undertunic, but all it is another tunic, probably a material conducive to direct contact with the skin (perhaps to wick away sweat/breathe).

In any case, head over to The Jedi Closet and Eileen will hook you up if you message her.  My wife had her outfit custom for about the same price as she had specific colors and materials in mind.  Mine was off the rack, so to speak